Transactions of the Korean Society of Machine Tool Engineers (한국공작기계학회논문집)

The Korean Society of Manufacturing Technology Engineers (한국생산제조학회)
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Estimation of Laser Welding Behavior of SM45C Steels by Plume Monitoring

플륨 모니터링에 의한 SM45C 레이저 용접특성 평가

  • Published : 2003.12.01
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Abstract

With the increased use of lasers in industrial welding applications, techniques for monitoring and controlling these processes become increasingly important. It is very important that we understand the dynamic behaviors of the laser induced Plume in welding, because the laser induced plume has considerable effects on welding efficiency and the quality of materials. As the plume fluctuation was associated with keyhole instability, unstable vapor plume indicated the process was unstable and would result in poor welds. An Infrared Thermal-vision Camera can be utilized compensate for incurracies encountered in real-time monitoring during laser welding. We have results that instabilities of plume are closely related with hot cracking and defect of laser welding.

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References

  1. Kim, J. D., Kim, C. J. and Chung, C. M., 2001, 'Repair Welding of Etched Tubular Components of Nuclear Power Plant by Nd:YAG Lasers', J. of MPT, Vol. 114, pp. 51-56 https://doi.org/10.1016/S0924-0136(01)00566-0
  2. Havrilla, D., 1999, 'Laser Welding of Stainless Tube', J. of Fabricator, Vol. 19, No.6, pp. 24-25
  3. XIE, J. and KAR, A., 1999, 'Laser Welding of Thin Sheet Steel with Surface Oxidation', The welding journal research supplement, Series S, p. 348
  4. Masaru, K., 2000, Laser Manufacturing Technologies, Korea Industrial Information Center, pp. 10- 30
  5. Banaa, C. M., 1978, Optics Engineering, pp. 210-215
  6. J. of KWS, Welding Dictionary, p. 65
  7. Kim, J. D. and Kim, Y. S., 2000, 'The State of In-Process Quality Monitoring Technology in Laser Welding', J. of KWS, Vol. 18, No. 4
  8. Yoo, Y. T., Ro, K. B., Oh, Y. S., Kim, J. S. and Im, K. G., 2003, 'Process Parameters of Butt Welding of SM45C Using a Continuous Wave Nd:YAG Laser Beam', Trans. of KSPE, Vol. 20, No. 7, PP. 44-55
  9. Yoo, Y. T., Oh, Y. S., Ro, K. B. and Im, K. G., 2003, 'Comparison of Welding Characteristics of Austenitic 304 Stainless Steel and SM45C Using a Continuous Wave Nd:YAG Laser', Trans. of KSMTE, Vol. 12, No. 3, PP. 58-67
  10. Jeong, H. C., 1999, 'Weld Hot Cracking in C-Mn Steel', J. of KWS, Vol. 17, No. 5, PP. 1-9
  11. Borland, J. C, 1961, 'Suggested Explanation of Hot Cracking in Mild and Low Alloy Steel Welds', J. of British Welding, Vol. 8, p. 526